[v4,48/68] btrfs: extent_io: make set_btree_ioerr() accept extent buffer

Commit Message

Qu Wenruo Oct. 21, 2020, 6:25 a.m. UTC

Current set_btree_ioerr() only accepts @page parameter and grabs extent
buffer from page::private.

This works fine for sector size == PAGE_SIZE case, but not for subpage
case.

Adds an extra parameter, @eb, for callers to pass extent buffer to this
function, so that subpage code can reuse this function.

Also since we are here, change how we grab "fs_info->flags" by using the
fs_info directly.

Signed-off-by: Qu Wenruo <[e-mail]>
---
 fs/btrfs/extent_io.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

Patch

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 76123d0f416a..1e182dfbb499 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4047,10 +4047,9 @@  static noinline_for_stack int lock_extent_buffer_for_io(struct extent_buffer *eb
 	return ret;
 }
 
-static void set_btree_ioerr(struct page *page)
+static void set_btree_ioerr(struct page *page, struct extent_buffer *eb)
 {
-	struct extent_buffer *eb = (struct extent_buffer *)page->private;
-	struct btrfs_fs_info *fs_info;
+	struct btrfs_fs_info *fs_info = eb->fs_info;
 
 	SetPageError(page);
 	if (test_and_set_bit(EXTENT_BUFFER_WRITE_ERR, &eb->bflags))
@@ -4060,7 +4059,6 @@  static void set_btree_ioerr(struct page *page)
 	 * If we error out, we should add back the dirty_metadata_bytes
 	 * to make it consistent.
 	 */
-	fs_info = eb->fs_info;
 	percpu_counter_add_batch(&fs_info->dirty_metadata_bytes,
 				 eb->len, fs_info->dirty_metadata_batch);
 
@@ -4104,13 +4102,13 @@  static void set_btree_ioerr(struct page *page)
 	 */
 	switch (eb->log_index) {
 	case -1:
-		set_bit(BTRFS_FS_BTREE_ERR, &eb->fs_info->flags);
+		set_bit(BTRFS_FS_BTREE_ERR, &fs_info->flags);
 		break;
 	case 0:
-		set_bit(BTRFS_FS_LOG1_ERR, &eb->fs_info->flags);
+		set_bit(BTRFS_FS_LOG1_ERR, &fs_info->flags);
 		break;
 	case 1:
-		set_bit(BTRFS_FS_LOG2_ERR, &eb->fs_info->flags);
+		set_bit(BTRFS_FS_LOG2_ERR, &fs_info->flags);
 		break;
 	default:
 		BUG(); /* unexpected, logic error */
@@ -4135,7 +4133,7 @@  static void end_bio_extent_buffer_writepage(struct bio *bio)
 		if (bio->bi_status ||
 		    test_bit(EXTENT_BUFFER_WRITE_ERR, &eb->bflags)) {
 			ClearPageUptodate(page);
-			set_btree_ioerr(page);
+			set_btree_ioerr(page, eb);
 		}
 
 		end_page_writeback(page);
@@ -4191,7 +4189,7 @@  static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
 					 end_bio_extent_buffer_writepage,
 					 0, 0, 0, false);
 		if (ret) {
-			set_btree_ioerr(p);
+			set_btree_ioerr(p, eb);
 			if (PageWriteback(p))
 				end_page_writeback(p);
 			if (atomic_sub_and_test(num_pages - i, &eb->io_pages))